Overview
The AMC3301DWER, produced by Texas Instruments, is a precision, isolated amplifier designed for high-accuracy current measurements. This device is optimized for shunt-based current sensing and features a fully integrated DC/DC converter, allowing single-supply operation from the low-side. The AMC3301 is particularly suited for applications requiring reinforced isolation and high common-mode transient immunity (CMTI). It operates over an extended industrial temperature range of –40°C to +125°C, making it versatile for various industrial and automotive environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3.3 V or 5 V | V |
| Input Voltage Range | ±250 mV | mV |
| Fixed Gain | 8.2 | - |
| Offset Voltage | ±150 μV (max) | μV |
| Offset Drift | ±1 μV/°C (max) | μV/°C |
| Gain Error | ±0.2% (max) | % |
| Gain Error Drift | ±40 ppm/°C (max) | ppm/°C |
| Nonlinearity | ±0.04% (max) | % |
| Common-Mode Transient Immunity (CMTI) | 85 kV/μs (min) | kV/μs |
| Isolation Voltage | 6000 VPK (reinforced), 4250 VRMS (for 1 minute) | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package | SOIC (16 pins) | - |
| Body Size | 10.30 mm × 7.50 mm | mm |
Key Features
- Integrated DC/DC converter for single-supply operation from the low-side.
- Optimized for shunt-based current measurements with a ±250 mV input voltage range.
- High DC accuracy with low offset voltage (±150 μV max) and low offset drift (±1 μV/°C max).
- Fixed gain of 8.2 with low gain error (±0.2% max) and gain error drift (±40 ppm/°C max).
- High common-mode transient immunity (CMTI) of 85 kV/μs min.
- Reinforced capacitive isolation barrier certified to VDE V 0884-11 and UL1577 standards.
- System-level diagnostic features including DC/DC converter fault detection and diagnostic output pin.
- Meets CISPR-11 and CISPR-25 EMI standards.
Applications
- Isolated shunt-based current sensing in protection relays.
- Motor drives.
- Power supplies.
- Photovoltaic inverters.
Q & A
- What is the input voltage range of the AMC3301?
The input voltage range of the AMC3301 is ±250 mV, optimized for current measurements using shunt resistors.
- What is the fixed gain of the AMC3301?
The fixed gain of the AMC3301 is 8.2.
- What is the common-mode transient immunity (CMTI) of the AMC3301?
The CMTI of the AMC3301 is 85 kV/μs min.
- What are the safety-related certifications of the AMC3301?
The AMC3301 meets safety-related certifications including 6000-VPK reinforced isolation per DIN VDE V 0884-11 and 4250-VRMS isolation for 1 minute per UL1577.
- What is the operating temperature range of the AMC3301?
The operating temperature range of the AMC3301 is –40°C to +125°C.
- Does the AMC3301 have integrated diagnostic features?
Yes, the AMC3301 includes system-level diagnostic features such as DC/DC converter fault detection and a diagnostic output pin.
- What package options are available for the AMC3301?
The AMC3301 is available in a SOIC (16 pins) package.
- What are the typical applications of the AMC3301?
The AMC3301 is typically used in isolated shunt-based current sensing in protection relays, motor drives, power supplies, and photovoltaic inverters.
- Does the AMC3301 meet EMI standards?
Yes, the AMC3301 meets CISPR-11 and CISPR-25 EMI standards.
- How does the AMC3301 achieve isolation?
The AMC3301 uses a double capacitive silicon dioxide (SiO2) insulation barrier for signal isolation and an on-chip transformer separated by a thin-film polymer for power isolation.
